Quote Originally Posted by CloudySky
While if JRPG is new, it usually has - new characters, new leveling system, new story, completely new world and new roles to play.RPG is role playing game, not creating role to play game what US developers seem to think.
By that definition, virtually every game is a role playing game. You're just as much playing the role of a vampire slayer in Castevania as you are a Soldier in Final Fantasy VII.

Role Playing games are those in which you control how character interacts with the world. This is the only interpretation that makes it different from any other game. Most JRPGs don't do this (rather taking incidental elements that aren't defining of the genre like a leveling system) and therefore they aren't really RPGs. Most Western RPGs (Baldur's Gate etc) do and therefore are far closer to the original premise of role playing (the most prominent route being Dungeons and Dragons).